Eversincehumanhastriedforthefirsttimetogetawayfromtheground,wehavewitnessedhugeprogressinspacetechonologyandthesuccessfullaunchofthemannedspacecraft,withoutdoubt,markedanothergiantstrideinhuman'sspacetrek.Amongthevariousmotivesthathavekeptusinpursuitoftheunknownouterspace,thereisaninterestingone:Arewealoneintheuniverse?
Quitealotofpeople,anumberofscientistincluded,havealwaysbeenconfidentthatsomewhereinthedarkspace,therearedefinitelyliveslikeus.Topicsofwhattheylooklike,dotheyhaveeyesandbodieslikewedo,oraretheyawareofoutexistenceneverfailtofascinatepeople,eventheremotelyskepticsoutthere.Anditisalwayassumedthattheymustbewayaheadofusintechonology.
However,atoughquestionhasbeenputforwardbythosewhoholdtheoppositeview:Iftherereallyisanotherspecieswithhigh-tech,howcomeweneverreceicvedanymessageorsignthattheysentout--iftheyareliveslikehumanwithmuchcapabletechnology,theysuremustbeinterstedinthesamequestionandthusmusthavebeentryingtocontactwithus.Andtheanswerisyetunknown.
Inmypointofview,withtherapiddevelopmentofhumantechnology,itiscertainthatsomedayinthefuturewewillhaveasatisfactoryanswertothebigquestion~